Gmail android app not updating
Under settings/data usage/gmail I found that 'restrict background data' was ON. Not sure when or how that got checked, but it may have been that way out of the box since my gmail has never synced on mobile data, even with a factory wipe. my problem was that "google play services" was restricted over cellular network so my emails only synced when i had wifi.
Under settings/data usage/google play services..data restriction off. My Phone Galaxy S4: On mobile network only my Gmail app was not pushing automatically, gmaps was slow, youtube was not working or really slow and Calendar wasn't syncing.
I have a Samsung Galaxy S3 and I love the new Gmail app. My only problem is that it doesn't sync emails (I don't receive any new notifications when new emails arrive, I have to manually click refresh in the app which is annoying) when I'm on Mobile Data.
When I'm on Wifi I receive notifications almost instantly.
After looking on the internet I was not able to find the solution.
I had to enable following under the Settings/Data Usage/Background data 1) Email 2) Gmail 3) Google Settings I had initially only enabled 1 & 2. Once i enabled Google Settings , the Gmail sync also started working.
Now, your emails should start syncing over both - wi-fi and Mobile Data too. Made sure that the Data restriction is OFF for your specific app or is OFF in general. Your Data is switched ON and has correct APN configured. Your Background Data usage is set to enable for the specific apps. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
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While no official fix has been released, there are a few ways to try and workaround the known issues.
Google had originally created Google Sync and Google Calendar Sync to synchronize Gmail accounts with Outlook.